# physics

A force of 300N is sufficient to keep a 100_kg wooden crate moving at constant velocity across a wooden floor. what is the coefficient of kinetic friction?

1. 👍
2. 👎
3. 👁
1. 300 = mu m g = mu * 100 * 9.81
That is it. Try yourself now.

1. 👍
2. 👎
2. M*g = 100 * 9.8 = 980 N. = Wt. of crate = Normal (Fn),
Fk = u*Fn = u * 100 = 100u = Force of kinetic friction,
F - Fk = M*a,
300 - 100u = 100*0 = 0,,
u = 3.

1. 👍
2. 👎

## Similar Questions

1. ### Physics

A 1000N crate is being pushed across a level floor at a constant speed by a force F of 300N at an angle of 20.0 degrees. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 300-N force is

2. ### Physics

Two workers are sliding 310kg crate across the floor. One worker pushes forward on the crate with a force of 440N while the other pulls in the same direction with a force of 230N using a rope connected to the crate. Both forces

3. ### Physics

Two workers are sliding 360 kg crate across the floor. One worker pushes forward on the crate with a force of 380 N while the other pulls in the same direction with a force of 280 N using a rope connected to the crate. Both forces

4. ### Physics

A crate sets on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and

1. ### physics

A crate sits on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and

2. ### physics

A dockworker loading crates on a ship finds that a 20 kg crate, initially at rest on a horizontal surface, requires a 73 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 50 N is

3. ### Physics

Once a 15 kg crate is in motion on a horizontal ﬂoor, a horizontal force of 51 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s What is µk, the coeﬃcient of kinetic friction, between

4. ### physics

Two workers are sliding 330 kg crate across the floor. One worker pushes forward on the crate with a force of 410 N while the other pulls in the same direction with a force of 240 N using a rope connected to the crate. Both forces

1. ### Physics

1. A block of mass 57.1 kg rests on a slope having an angle of elevation of 28.3°. If pushing downhill on the block with a force just exceeding 162 N and parallel to the slope is sufficient to cause the block to start moving,

2. ### physics

You are pushing a 30-kg wooden crate across the floor. The force of sliding friction on the cate is 90 N. How much force, in newtons, must you exert on the crate to keep it moving with constant velocity?

3. ### Physics

A rope exerts a constant horizontal force of 203N pulling a 68-kg crate across the floor. The velocity of the crate is observed to increase from 3m/s to 5m/s in a time of 4 seconds under the influence of this force and the

4. ### Physics

A force of 300 N is sufficient to keep a 100 kg crate moving at a constant speed across a wooden floor. What is the coefficient of sliding floor?